Precision TechnologyAuto calibration, high precision sensors measure in increments of 0.2 lb./0.05 kg with 396lbs/180kg capacity. 4 high sensitive electrodes, 3 x AAA batteries included. Professional tempered glass and 3.3 inch highlight LCD Display with large and bright reading numbers. Bluetooth SyncInstead of recording your weight manually, smart scales do the job for you. Syncing with FITDAYS App, Bluetooth to automatically send data directly to your phone and can be viewed on your smart phone at any time. Each fat weight scale can be connected with your iOS or Android smart phone via Bluetooth 4.0 connectivity. Explore Your Body CompositionThe body Scale supports a whopping 19 health metrics, including Body Fat Percentage, body mass index (BMI), Basal Metabolic Rate (BMR), Muscle mass, Bone mass, lean body mass, visceral fat and more. From weight loss and management, to helping you achieve their lean body mass target. Smart FITDAYS APPDownload FITDAY app at App Store/Google Play or download APP by scan the QR code in the instruction manual.Especially perfect for body builder, weight loser, junior and teenager etc Package Contents 1 x Digital Weight Scale, 1 x User Manual, 3 x 1.5V AAA batteries